package com.qf.web.controller;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.Method;

public class BaseServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");//设置编码
        String methodName = request.getParameter("method");
        //反射
        try {
            Method method = this.getClass().getMethod(methodName, HttpServletRequest.class, HttpServletResponse.class);
            if (method != null) {
                    String url = (String) method.invoke(this, request, response);
                    System.out.println(url);
                    if (url == null || url.trim().length() == 0) {
                        return;
                    }
                    //转发重定向
                    if (url.startsWith("redirect:")) {//重定向
                        String redirectUrl = url.substring(url.indexOf(":") + 1);
                        response.sendRedirect(request.getContextPath() + redirectUrl);
                    } else {
                        request.getRequestDispatcher(url).forward(request, response);
                    }
                }
            }catch(Exception e){
                e.printStackTrace();
            }
        }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }
}
